As Shadorne has said, some DACs display the incoming signal. The bottom line is what type of sound quality you can get from your rig. I can get sensational sound quality from steaming Tidal's upper quality service through ROON.
But, to get the most out of it you need to work with ROON's digital engine settings.
I have heard some MQA demos and I'm not terribly impressed. Pretty overblown imo.